Really not sure yet... I washed the sheets and pillow cases on a gentle cycle just after I received them.  Some of the seams on the pillow cases seem to be really weak. I have not put the sheets on my bed yet;  time will tell  if I purchase this type again. I'm not sure how to rate my purchase  at this time. 

Well I'm ready now to rate these sheets, it's been about 2 weeks: the seams that I thought were weak, that was just a lot of loose threads, no big deal. Over all the sheets were a great deal. I'm pleased..